AUGER FLIGHT Russian patent published in 2018 - IPC E21B17/22 

FIELD: soil or rock drilling.

SUBSTANCE: invention relates to drilling equipment, namely to drilling auger columns used in seismic drilling to blast wells in complex geological sections, as well as in construction, in construction of bored piles, and in engineering surveys for well casing. Auger flight, preferably hollow, is equally passive, with a flange on its entire length, contains the main part of the auger flight in the form of a supporting tube, nipple located at one of its ends, and a clutch – on the other end, forming the locking joint of auger flights in the drillstring, the outer diameter of which significantly exceeds the diameter of the pipe. Step of the flange located on the locking joint area exceeds the flange step of the auger flight main part, wherein the ratio of the flange step located at the locking joint area to the flange step of the auger flight main part is equal to the ratio of the cross-sectional area of the auger flight transport space on its main part to the cross-sectional area of the transport space in the auger flight locking joint area.

EFFECT: proposed is a device for drilling auger columns used in seismic drilling to blast wells in complex geological sections, as well as in construction, in construction of bored piles, and in engineering surveys for well casing.

1 cl, 2 dwg